	US 12,031,040 B2
	Tread rubber composition and pneumatic tire
Kenya Watanabe, Kobe (JP)
Assigned to Sumitomo Rubber Industries, Ltd., Hyogo (JP)
Filed by Sumitomo Rubber Industries, Ltd., Hyogo (JP)
Filed on Oct. 14, 2021, as Appl. No. 17/501,956.
Application 17/501,956 is a division of application No. 16/518,720, filed on Jul. 22, 2019, granted, now 11,174,375.
Claims priority of application No. 2018-147630 (JP), filed on Aug. 6, 2018.
Prior Publication US 2022/0033625 A1, Feb. 3, 2022
This patent is subject to a terminal disclaimer.
Int. Cl. C08L 9/06 (2006.01); B60C 1/00 (2006.01); C08K 3/04 (2006.01); C08K 3/06 (2006.01); C08K 3/22 (2006.01); C08K 3/36 (2006.01); C08K 5/09 (2006.01); C08L 7/00 (2006.01); C08L 9/00 (2006.01); C08L 91/06 (2006.01); B60C 11/00 (2006.01)

CPC C08L 9/06 (2013.01) [B60C 1/0016 (2013.01); C08K 3/04 (2013.01); C08K 3/06 (2013.01); C08K 3/22 (2013.01); C08K 3/36 (2013.01); C08K 5/09 (2013.01); C08L 7/00 (2013.01); C08L 9/00 (2013.01); C08L 91/06 (2013.01); B60C 2011/0025 (2013.01); C08K 2003/2296 (2013.01); C08L 2205/02 (2013.01)]

12 Claims

1. A pneumatic tire, comprising a tread at least partially comprising a tread rubber composition, the tread rubber composition comprising a styrene-butadiene rubber and having a tan δ peak temperature of −10° C. or higher and a brittleness temperature of −43° C. or lower,

wherein the tread rubber composition comprises, per 100 parts by mass of a rubber component therein, 5 to 20 parts by mass of a carbon black, and

wherein the styrene-butadiene rubber has a glass transition temperature (Tg) of from −49° C. to −29° C.